Filtering on a sub task

[frich]

I'm using Project to track multiply (800+) projects at a high level, each
project has only four stages (sub tasks). I want to be able to report on
these stages separately over a specified timeline. i.e. I want to display
all stage 1's only with a timeline of the year 2005.

The only way I have been able to do this is by utilizing the resource group
and assign the same four names as my stages and filtering on the resource
group.

The only issue with this is that it requires that I open each sub task
separately and assign a resource group. And that’s 3200 sub tasks.

 

[Haixiang]

i think you don't need to use resource,try to use custom fields such as text1.
but you still need to assign 3200 tasks.
see you task name to find if there are some key words for each stage,try to
use these key words to filter your tasks, if this works ,done.
if this works partially, at least it can minimize the task range,so you can
easily assign your custom field.